TY - JOUR
T1 - Diffusion in microstructured block copolymers
T2 - Chain localization and entanglements
AU - Dalvi, M. C.
AU - Eastman, C. E.
AU - Lodge, T. P.
PY - 1993/1/1
Y1 - 1993/1/1
N2 - The diffusion (Ds) of entangled and unentangled symmetric block copolymers is compared, above and below the ordering transition. The lamellar samples were not macroscopically oriented, and thus Ds reflects a combination of mobilities parallel and perpendicular to the lamellar planes. For unentangled (Rouse) chains, Ds is unaffected by the microstructure, whereas entangled (reptating) chains are retarded significantly; this difference reflects an interesting combination of thermodynamic and entanglement constraints. Furthermore, this retardation persists into the nominally disordered state.
AB - The diffusion (Ds) of entangled and unentangled symmetric block copolymers is compared, above and below the ordering transition. The lamellar samples were not macroscopically oriented, and thus Ds reflects a combination of mobilities parallel and perpendicular to the lamellar planes. For unentangled (Rouse) chains, Ds is unaffected by the microstructure, whereas entangled (reptating) chains are retarded significantly; this difference reflects an interesting combination of thermodynamic and entanglement constraints. Furthermore, this retardation persists into the nominally disordered state.
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U2 - 10.1103/PhysRevLett.71.2591
DO - 10.1103/PhysRevLett.71.2591
M3 - Article
AN - SCOPUS:0000810976
SN - 0031-9007
VL - 71
SP - 2591
EP - 2594
JO - Physical Review Letters
JF - Physical Review Letters
IS - 16
ER -